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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Kinetics of Deuterium Exchange on Resorcinol in D_2O at High Pressure and High
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Kinetics of Deuterium Exchange on Resorcinol in D_2O at High Pressure and High

机译：高压高压下D_2O中间苯二酚上氘交换的动力学

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摘要

The kinetics of deuteration of resorcinol in pure D_2O were studied for the first time using a flow-through capillary tubular reactor with on-line, proton, and deuterium NMR detection at high temperatures and high pressure. The global rate constants for hydrogen/deuterium (H/D) exchange were determined from temperatures of 200-450 ℃ (723 K) at a pressure of ～400 bar (the critical temperature and pressure of water are 374.2 ℃ and 218.3 bar, respectively). The H/D exchange rate in resorcinol (1,3-dihydroxybenzene) under these extreme conditions was determined using proton NMR as a function of the resorcinol residence time in a capillary tubular reactor, which also served as a high-pressure NMR cell. The ~H and ~2H NMR results indicate that H/D exchange in resorcinol for the ring protons was observed at temperatures as low as 200 ℃. The kinetics of H/D exchange in resorcinol and the activation energy was extracted from the experimental ~1H NMR data.
机译：使用在高温高压下在线，质子和氘核磁共振检测的流通毛细管反应器，首次研究了纯D_2O中间苯二酚的氘代动力学。氢/氘（H / D）交换的总速率常数是在200〜450℃（723 K）的温度和〜400 bar的压力下确定的（水的临界温度和水压分别为374.2℃和218.3 bar） ）。在这些极端条件下，使用质子NMR测定间苯二酚（1,3-二羟基苯）中的间苯二酚的H / D交换率是间苯二酚在毛细管反应器中的停留时间的函数，该毛细管反应器还用作高压NMR池。 〜H和〜2H NMR结果表明，在低至200℃的温度下，间苯二酚中的环质子发生了H / D交换。间苯二酚中H / D交换的动力学和活化能是从实验〜1H NMR数据中提取的。

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